As of Friday the 19th of February 2016, Google confirmed that paid ads will no longer show in the right sidebar of Google desktop results pages – something that has been tested by Google on and off over the years.

So…where have the ads moved to?

More info

Optimising or creating content for a website that Google likes is essential if you wish your site to be found easily, particularly if you are looking for a return on your investment.
More info